Manual

130 Functions
}
scaled_delay( ) Function
The scaled_delay( ) function generates a delay that scales with the input clock for
the Neuron Chip or the Smart Transceiver.
The formula for determining the duration of the delay is the following:
delay = (25.2 * count + 7.2) * S ( delay is in microseconds)
In the formula above, the scaling factor
S is determined by the input clock, as
shown in
Table 31.
Table 31. Determining S
S
Input Clock Rate
(Series 3100)
System Clock Rate
(Series 5000)
0.063 — 80 MHz
0.125 — 40 MHz
0.25 40 MHz 20 MHz
0.5 20 MHz 10 MHz
1 10 MHz 5 MHz
1.5259 6.5536 MHz —
2 5 MHz —
4 2.5 MHz —
8 1.25 MHz —
16 625 kHz —
See also the delay( ) and msec_delay( ) functions. The delay( ) function generates
a delay that is not scaled and is only minimally dependent on the input clock.
The msec_delay( ) function provides a scaled delay of up to 255 milliseconds.
Syntax
void scaled_delay (unsigned long count );
count A delay value between 1 and 33333. The formula for
determining the duration of the delay is based on count
and the Neuron input clock (see above).
Example
IO_2 output bit software_one_shot;